I would not feed spiders. They are unnecessary as feeders. Yes they feed on them but the spiders can also harm the toads.

I would advise against feeding from your basement because the insects can get into stuff that if your toads eat the insects can harm them.

If you are going to use feeders from outside culture them so that way you have an abundance. You can use grasshoppers, ants and earwigs doing this. Make sure you breed them for generations though so anything would pass from the original wild specimens.

Isopods can be a staple but not as long as crickets. As Dan said Repti Worms, Waxworms, Butterworms, Crickets, Mealworms, Silkworms, Hornworms are all good feeders to rotate with.

It's up to you but for keeping captive toads field collecting isn't a good route.

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